Anthian City - Battle District

Anthian City - Battle District is home to the fourth gym in players' Roria journey. This area features many aeroplane models and a runway. The Pokémon Centre of Anthian City, as well as Anthian Airport — which doubles as the 4th Gym -- are also built here, while the Roria Battle Frontier is currently being constructed here as well.

Anthian Gym & Airport
Occupying the most space in the Battle District, the Anthian Gym is one of the most important buildings in the entire city, because it also functions as an airport with the runway next to it. Gym Leader Stephen is in charge of this gym. He specializes in -type Pokémon. Upon entering the gym, he is seen fixing his private jet, and he requests the player to find 3 items. The player has to defeat the gym trainers in order to fetch the items -- 2 of them are vital for accessing the higher floors. Stephen will come out and fight the player when the 3 items are all given to him. Once defeated, he will give out the Soaring Badge, as well as TM40 Aerial Ace.

Right after the player clears and steps out from Anthian Gym, he or she will see the Eclipse Airship flying over his or her head, seemingly heading for Anthian Park...... The player is strongly recommended to heal his or her Pokémon before proceeding.

Battle Frontier
The Roria Battle Frontier is located next to the Pokémon Centre (which has different exterior design comparing to Pokémon Centre in earlier towns). However, it is currently under construction.

Trivia

 * Gym Leader Stephen is based off of Crazyman32 — the creator of numerous famous aviation games such as Perilous Skies, RO-Port Tycoon and Freeflight.
 * There were some trash bags and a dumpster between the Battle Frontier construction site and Pokémon Centre, hinting for some Pokémon counter. However, they have been removed from version 0.9 update on 13/12/2016 onwards, and the Pokémon can only be encountered in Housing District.